21441502 has 4 divisors (see below), whose sum is σ = 32162256. Its totient is φ = 10720750.

The previous prime is 21441493. The next prime is 21441523. The reversal of 21441502 is 20514412.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21441502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360374 + ... + 5360377.

It is an arithmetic number, because the mean of its divisors is an integer number (8040564).

Almost surely, 2^21441502 is an apocalyptic number.

21441502 is a deficient number, since it is larger than the sum of its proper divisors (10720754).

21441502 is a wasteful number, since it uses less digits than its factorization.

21441502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720753.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21441502 is about 4630.4969495725. The cubic root of 21441502 is about 277.8124694924.

Adding to 21441502 its reverse (20514412), we get a palindrome (41955914).

The spelling of 21441502 in words is "twenty-one million, four hundred forty-one thousand, five hundred two".